Yes that means the underdrive pullies. And ditch them means get rid of them.
What happens is they are so small and light weight that they spin way to fast and shatter the gears in the water pump. Our/any motor with no water will over heat and eventually blow up. There not worth it to have on.
they do not shatter water pump gears...they shatter oil pump gears!
they do not shatter them because they are so small and lightweight that they spin way to fast...they are too small to dampen the harmonics on the crank shaft, where the oil pump gears are driven, therefore the harmonics are transferred to the weak metal oil pump gears and they shatter. :beer:
A small diameter dampener (it's not an UDP) will not result in broken oil pump gears, especially one that has a lot of mass. I've installed many of them and none have caused this. There have been more damaged engines due to bad tunes and missed shifts than borken oil ump gears due to small diamater dampeners. The internet mechanics have kept this rumor going for years.
The March Fluid Dampener and the new Steeda dampener are great pieces and will free up some power.
Now to the parts needed for an eaton swap:
supercharger
manifold
intercooler and hoses/lines
injectors
MAF
TB
IAC
intake tube
throttle and cruise cables
03/04 cobra front cover
pulleys and pulley bridge
alternator
alternator bracket
lower pulley
03/04 dampener
heat exchanger with lines
intercooler pump
misc lines/hoses/hardware
upgraded fuel pump
The easiest thing is to buy a complete eaton swap kit from a wrecked car. I've sold two recently and you should be able to find one pretty cheap.
You'll ahve to relocate the IAT sensor to a point where it read the boosted inlet temp
We put one on a Mach, stock blower wtih a 6lb lower pulley and it made 450rwhp on a safe tune. The engine probably won't last long at that power level but it's where the owner wanted it.
Also, we did a rebuild on a eaton swap Mach and the compression was set at 8.5 to 1, it made 50rwhp less than it did with stock compression and pre-boost power sucked. Torque was down a lot across the entire range.